/*
 * Copyright (C) 2011 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jboss.errai.ui.client.widget;

/**
 * Indicates that the implementing widget displays an instance of type <M>.
 * 
 * @author Christian Sadilek <csadilek@redhat.com>
 * 
 * @param <M>
 *          the model type.
 */
public interface HasModel<M> {

  /**
   * Returns the model instance associated with this widget.
   * 
   * @return the model instance, or null if no instance is associated with this widget.
   */
  public M getModel();

  /**
   * Associate the model instance with this widget.
   * 
   * @param model
   *          the model instance.
   */
  public void setModel(M model);
}
